How to access iframe checkbox elements

Question

I have a web page that consists of a checkbox (parent) and on this same web page, I also have a iframe that is sourced from another page that displays a number of records, which

Answer 1

Okay here is an example...

First here is the source for the iFrame contents (I called it FramePage.htm)...

Here is the source on the page that houses the iFrame...

Clicking the button on the parent page will select all the checkboxes with the name 'checkboxes' on the frame page.

Hope this helps :)